After Ichabod Crane "dies" during a mission for General George Washington in 1781, he awakens in 2013 Sleepy Hollow, New York. But so does the Headless Horseman, whose head Ichabod chopped off before his perceived death. The horseman begins his nightly killing spree, and Ichabod must partner with Lt Abbie Mills.
Abbie investigates the horseman after he kills the sheriff (Clancy Brown). While hunting the horseman, Abbie looks into the old case files her old partner (the former sheriff) was investigating and learns of two types of occult groups—one for good, the other evil—which may have summoned the horseman again. If the horseman is not stopped, dark supernatural forces will affect the Earth. This becomes more difficult as the Horseman discovers modern weaponry, which he assimilates into his ritualistic hunt. Ichabod must also adjust to the societal and technological differences of the 21st century.